Uenotaira Tuff Breccia

[ Top ] [ Japanese ]

Uenotaira Tuff Breccia Kaneko, 1988

Type locality: western slope of Mount Kogenashiyama, Nozawaonsen city, Shimotakai county, Nagano prefecture
Volcanic rocks
early Pleistocene

Lithofacies: Augite hypersthene andesite tuff breccia

Thickness: 30 - 40 m
Upper limit: Unconformity (Uenotaira Lava)
Lower limit: Unconformity (Karanosawa Lava)

Upper group
[ Upper ]
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Uenotaira Lava
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Uenotaira Tuff Breccia
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Shigarindo Lava
~~~~~~~~~~~~~~
Jokurayama Lava
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Shimizudairarindo Lava
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Tarudaki Lava
~~~~~~~~~~~~~~
[ Lower ]

Kenashiyama volcano
[ Upper ]
~~~~~~~~~~~~~~
Upper group
~~~~~~~~~~~~~~
Lower group
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[ Lower ]

Kenashi volcano
[ Upper ]
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Kenashiyama volcano
~~~~~~~~~~~~~~
Western basal volcanic rocks / Mizuo-Oiriyama volcano
~~~~~~~~~~~~~~
[ Lower ]

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Mount Kogenashiyama - Uenotaira, Nozawaonsen city, Shimotakai county, Nagano pref.

Yanagisawa et al. (2000) Geology of the Iiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 144p. (in Japanese with English abstract 6p.)